From 1314abd2d61877a92e5289452dee308e98dab0c1 Mon Sep 17 00:00:00 2001
From: Jaroslav Kysela <perex@perex.cz>
Date: Mon, 27 Feb 2017 09:04:08 +0100
Subject: [PATCH] amidi: optarg might be NULL, fix 't' argument parsing

---
 amidi/amidi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/amidi/amidi.c b/amidi/amidi.c
index a8264f1..0fb032e 100644
--- a/amidi/amidi.c
+++ b/amidi/amidi.c
@@ -510,7 +510,8 @@ int main(int argc, char *argv[])
 			dump = 1;
 			break;
 		case 't':
-			timeout = atof(optarg);
+			if (optarg)
+				timeout = atof(optarg);
 			break;
 		case 'a':
 			ignore_active_sensing = 0;